I've not seen the newer bulbs. There does seem to be significant differences between the E27 and B22 bulbs so I'm not too surprised. Those 7 connections are likely to be very useful and easier to solder to. Somebody needs to get a scope on them!

Nicely done. Only noticed your Instructable after I published my similar-ish one.If Philips ever start kicking out the Cree bulbs, I managed to find a similar PWM output (and a simple on/off) on a Hue B22 bulb PCB. Definitely trickier to connect to than the Cree though!

I think it might be your fault that it didn't work. That's not how you drive LEDs. They will need a constant current supply, not a constant voltage one. And you definitely shouldn't wire them in parallel.